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100 lines
2.9 KiB
100 lines
2.9 KiB
//========================================================================
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//
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// SplashXPath.h
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//
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//========================================================================
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#ifndef SPLASHXPATH_H
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#define SPLASHXPATH_H
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#include <aconf.h>
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#ifdef USE_GCC_PRAGMAS
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#pragma interface
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#endif
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#include "SplashTypes.h"
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class SplashPath;
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struct SplashXPathAdjust;
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//------------------------------------------------------------------------
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#define splashMaxCurveSplits (1 << 10)
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//------------------------------------------------------------------------
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// SplashXPathSeg
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//------------------------------------------------------------------------
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struct SplashXPathSeg {
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SplashCoord x0, y0; // first endpoint
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SplashCoord x1, y1; // second endpoint
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SplashCoord dxdy; // slope: delta-x / delta-y
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SplashCoord dydx; // slope: delta-y / delta-x
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Guint flags;
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};
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#define splashXPathFirst 0x01 // first segment of a subpath
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#define splashXPathLast 0x02 // last segment of a subpath
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#define splashXPathEnd0 0x04 // first endpoint is end of an open subpath
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#define splashXPathEnd1 0x08 // second endpoint is end of an open subpath
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#define splashXPathHoriz 0x10 // segment is vertical (y0 == y1)
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// (dxdy is undef)
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#define splashXPathVert 0x20 // segment is horizontal (x0 == x1)
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// (dydx is undef)
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#define splashXPathFlip 0x40 // y0 > y1
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//------------------------------------------------------------------------
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// SplashXPath
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//------------------------------------------------------------------------
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class SplashXPath {
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public:
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// Expands (converts to segments) and flattens (converts curves to
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// lines) <path>. Transforms all points from user space to device
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// space, via <matrix>. If <closeSubpaths> is true, closes all open
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// subpaths.
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SplashXPath(SplashPath *path, SplashCoord *matrix,
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SplashCoord flatness, GBool closeSubpaths);
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// Copy an expanded path.
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SplashXPath *copy() { return new SplashXPath(this); }
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~SplashXPath();
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// Multiply all coordinates by splashAASize, in preparation for
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// anti-aliased rendering.
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void aaScale();
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// Sort by upper coordinate (lower y), in y-major order.
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void sort();
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private:
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SplashXPath();
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SplashXPath(SplashXPath *xPath);
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void transform(SplashCoord *matrix, SplashCoord xi, SplashCoord yi,
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SplashCoord *xo, SplashCoord *yo);
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void strokeAdjust(SplashXPathAdjust *adjust,
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SplashCoord *xp, SplashCoord *yp);
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void grow(int nSegs);
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void addCurve(SplashCoord x0, SplashCoord y0,
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SplashCoord x1, SplashCoord y1,
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SplashCoord x2, SplashCoord y2,
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SplashCoord x3, SplashCoord y3,
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SplashCoord flatness,
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GBool first, GBool last, GBool end0, GBool end1);
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void addSegment(SplashCoord x0, SplashCoord y0,
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SplashCoord x1, SplashCoord y1,
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GBool first, GBool last, GBool end0, GBool end1);
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SplashXPathSeg *segs;
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int length, size; // length and size of segs array
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friend class SplashXPathScanner;
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friend class SplashClip;
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friend class Splash;
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};
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#endif
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